Vacuum cleaner



FIG. 1 is a front, top and right perspective view of a vacuum cleaner showing our new design;

FIG. 2 is front elevation view thereof;

FIG. 3 is a rear elevation view thereof:

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof. 

We claim the ornamental design for a vacuum cleaner, as shown and described. 